学前教育的基本功能是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31376' and id < 2516568 and id<>'2516568' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31376' and id > 2516568 and id<>'2516568' order by id asc limit 5